Fix changelog numbering

Author: georgefst

CHANGES.txt

@@ -1,12 +1,12 @@
 Changelog for Shake (* = breaking change)
 
     Test with GHC 9.12
-0.9.8, released 2024, 2024-01-14
+0.19.8, released 2024, 2024-01-14
     Test with GHC 9.8
     #844, optimise database reading/writing with use unsafeUseAsCString
     #836, add threaded flag to disable using threaded runtime
     #837, require filepath-1.14
-0.9.7, released 2022-09-15
+0.19.7, released 2022-09-15
     #815, improve corrupt database handling code
     Don't say (changed) for files that don't build
 0.19.6, released 2021-09-07